The more times I watch it, the more I an convinced that Freeman's performance as Bilbo is going to be special. That scene captures perfectly the sense that even though he feels completely overwhelmed by events, there is a hidden courage, strength, compassion and wisdom inherent in Bilbo's character. It's a perfect blend of nervousness and spirit that shows the conflict of the veneer of a comfortable life he had been wearing and the wise adventuresome spirit that is really inside.